*{
    margin: 0;
    padding: 0;
}
a{
    text-decoration: none;
}
ul li{
    list-style: none;
}
.login_top{
    width: 100%;
    height: 70px;
    line-height: 70px;
}
.login_top>a{
    display: inline-block;
    width: 155px;
    height: 70px;
    line-height: 70px;
    float: left;
    margin-left: 145px;
    margin-right: 30px;
    background: url(../images/signin-register-logo.png) white no-repeat center ;
}
.login_top .top_p{
    display: inline-block;
    height: 42px;
    width: 134px;
    border-left: 1px solid #e6e6e6;
    margin-top: 15px; 
}
.login_top .top_p p{
    text-align: center;
    font-size: 20px;
    line-height: 42px;
}
.login_bottom{
    width: 100%;
    height: 555px;
    position: relative;
    background: url(../images/login-bgtu.jpg) no-repeat center;
}
.login_bottom .login_form{
    width: 380px;
    height: 450px;
    background: white;
    position: absolute;
    top: 40px;
    right: 145px;
    text-align: center;
}
.login_bottom .login_form .form_tab{
    width: 348px;
    height: 40px;
    background: #f3f3f3;
    display: flex;
    line-height: 40px;
    margin-left: 15px;
    margin-top: 40px;
}
.login_bottom .login_form .form_tab a{
    width: 174px;
    text-align: center;
    display: inline-block;
    font-size: 12px;
}
.login_bottom .login_form .form_tab a{
    color: black;
}
.login_bottom .login_form .form_tab .form_a{
    background: #333333;
    color: white;
}
.login_bottom .login_form form div{
    width: 313px;
    height: 38px;
    margin-left: 32px;
    border: 1px solid;
    margin-top: 28px;
    
}
.login_bottom .login_form form .deng i{
    display: inline-block;
    float: left;
    width: 48px;
    height: 38px;
    background: url(../images/icon_sig_reg.png) -169px -27px;
}
.login_bottom .login_form form .mima i{
    display: inline-block;
    float: left;
    width: 48px;
    height: 38px;
    background: url(../images/icon_sig_reg.png) -168px -61px;
}
.login_bottom .login_form form input{
    border: 0;
    width: 235px;
    height: 38px;
    float: right;
    outline: none;
    line-height: 37px;
    font-size: 12px;
}
.login_bottom .login_form .wangji{
    display:inline-block;
    font-size: 12px;
    float: right;
    margin-right: 32px;
    margin-top: 36px;
    border-bottom: 1px solid #666666;
    line-height: 11px;
    color: #666666;
}
.login_bottom .login_form .click_denglu{
    display:inline-block;
    width: 312px;
    height: 40px;
    text-align: center;
    background: black;
    line-height: 40px;
    color: white;
    margin-top: 5px;
    margin-bottom: 7px;
}
.login_bottom .login_form>span{
    display: inline-block;
    font-size: 12px;
    color: #999999;
    
}
.login_bottom .login_form .cop_link{
    display: inline-block;
    width: 338px;
    height: 54px;
    margin-top: 5px;
    text-align: center;
    position: relative;
}
.login_bottom .login_form .cop_link a{
    display: inline-block;
    width: 36px;
    height: 32px;
    margin: 11px 8px;
}
.login_bottom .login_form .cop_link a:nth-child(1){
    background: url(../images/icon_sig_reg.png) -37px -20px;
}
.login_bottom .login_form .cop_link a:nth-child(3){
    background: url(../images/icon_sig_reg.png) -73px -21px;
}
.login_bottom .login_form .cop_link a:nth-child(5){
    background: url(../images/icon_sig_reg.png) -110px -22px;
}
.login_bottom .login_form .cop_link a:nth-child(7){
    background: url(../images/icon_sig_reg.png) -37px -57px;
}
.login_bottom .login_form .cop_link a:nth-child(9){
    background: url(../images/icon_sig_reg.png) -73px -57px;
}
.login_bottom .login_form .cop_link span{
    display: inline-block;
    height: 12px;
    top: 18px;
    font-size: 12px;
    color: #e1e5ec;
    margin-left: -11px;
    position: absolute;
}
.login_footer{
    width: 100%;
    height: 95px;
    font-size: 12px;
    color: #666666;
    text-align: center;
    line-height: 45px;
}
.login_footer a{
    color: #aaaaaa;
}